R2D2 Is FOUND!

R2D2 can be seen after Devastator opens his vortex. When the camera pans out and the Twins are standing in awe (right before they speak: "Look at this motha; Mean robots suck"). You will see a camper rolling towards Devastator in the lower left corner. Right after the camper exits the screen R2D2 come in from the far right middle to about the center of the screen, then boosts to exit the left middle towards devastator.

*Depending on where you watch it. Look around the 1:56 - 1:57 time code